function GetXmlHttpObject()
  {
	  var xmlHttp=null;
  	  try
      {
   // Firefox, Opera 8.0+, Safari
      	xmlHttp=new XMLHttpRequest();
      }
      catch (e)
      {
   // Internet Explorer
   	   try
   	   {
   	   	   xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
       }
       catch (e)
       {
           xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
       }
   	  }
  	  return xmlHttp;
 }
